This is especially important when raw vegetables are eaten.
3. Drinking contaminated water
Unsafe water can carry infectious material.
Families should use reliable drinking water sources and follow appropriate water treatment recommendations when necessary.
4. Poor sanitation
When human waste is not safely managed, parasite eggs can contaminate the surrounding environment.
This creates opportunities for repeated exposure within a community.
The WHO explains that soil-transmitted helminths spread through eggs in human feces that contaminate soil, food, and water.
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What happens after the eggs are swallowed?
The life cycle of Ascaris is more complicated than many people realize.
After infective eggs enter the digestive system, larvae hatch in the intestine.
They penetrate the intestinal lining and travel through the bloodstream toward the liver and lungs.
In the lungs, the larvae develop further before moving up the respiratory passages toward the throat.
They are then swallowed again.
Eventually, they return to the small intestine, where they mature into adult worms.
The entire process takes several weeks.
Once mature, the worms can live in the intestine for approximately one to two years.
A female roundworm can produce a large number of eggs each day, which leave the body through feces.
These eggs must develop in the environment before becoming infective to another person.
This is an important distinction: people do not normally become infected simply by touching fresh feces from an infected person. The eggs need time under suitable environmental conditions to become infectious.
Image 2 β Adult Ascaris lumbricoides roundworms, an example of the parasite responsible for ascariasis.
Why are children particularly vulnerable to complications?
Children may be more affected by heavy intestinal worm infections because their nutritional needs are high and their digestive systems are still developing.
A substantial parasite burden can interfere with normal nutrition and contribute to poor growth.
In severe cases, the relatively narrow intestinal passage in younger children can become obstructed by a large mass of worms.
This may cause intense abdominal pain, repeated vomiting, and abdominal distension.
The obstruction can also interfere with the normal movement of digestive contents.
If pressure continues to increase, the intestinal wall may become damaged.
In very serious cases, complications can include intestinal perforation, inflammation of the abdominal cavity, and tissue injury caused by reduced blood supply.
These complications require immediate medical attention.
It is important to emphasize that not every child with intestinal worms develops an obstruction.
Most infections do not result in this severe complication.
However, persistent vomiting and significant abdominal pain should never be treated as ordinary symptoms without medical evaluation.
The earlier the infection is identified, the sooner appropriate treatment can begin.
Chapter 3: Why Heavy Worm Infections Can Cause Continuous Vomiting and Intestinal Blockage
One of the most frightening complications associated with heavy roundworm infections is intestinal obstruction.
To understand why this can happen, it helps to know how the digestive system normally works.
Food travels from the stomach into the small intestine, where digestive enzymes break it down and nutrients are absorbed.
The remaining material continues through the intestinal tract toward the large intestine.
This process depends on coordinated muscular contractions known as peristalsis.
These contractions move intestinal contents forward.
When a physical blockage develops, normal movement becomes difficult or impossible.
In severe ascariasis, large numbers of adult worms may collect together inside the intestinal passage.
Instead of moving freely, they can become entangled and form a dense mass.
The resulting obstruction prevents digestive contents from passing normally.
Pressure begins to build up behind the blockage.
This can trigger several symptoms.
1. Repeated vomiting
Vomiting is one of the most noticeable signs of intestinal obstruction.
As digestive contents accumulate, the stomach and upper intestine may become increasingly distended.
The body responds by trying to expel the contents.
Initially, the child may vomit food and stomach fluid.
In some cases of obstruction, vomiting may become green or yellow-green because it contains bile.
Later, if the obstruction becomes severe, the vomit may have an unpleasant fecal odor.
These symptoms are serious and require emergency assessment.
Parents should never attempt to treat persistent vomiting at home with anti-vomiting medication without medical advice.
2. Increasing abdominal pain
A child with intestinal obstruction may experience cramping abdominal pain.
The pain can come in waves as the intestine contracts against the blockage.
In more advanced cases, the pain may become continuous.
A child may curl up, refuse to move, or become unusually distressed.
Severe or worsening abdominal pain should always be assessed urgently.
3. Abdominal swelling
As gas and digestive contents accumulate, the abdomen may become enlarged.
Parents may notice that the child's stomach looks unusually swollen or feels firm.
Abdominal distension combined with vomiting is an especially important warning sign.
4. Reduced bowel movements
A significant obstruction can prevent stool and gas from passing through the digestive system.
The child may stop having normal bowel movements.
However, the absence of constipation does not rule out an obstruction, particularly during its early stages.
5. Dehydration and weakness
Repeated vomiting causes the body to lose water and important electrolytes.
Children can become dehydrated more quickly than adults.
Signs may include:
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Dry mouth and tongue.
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Reduced urination.
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Sunken eyes.
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Dizziness or unusual sleepiness.
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Rapid heartbeat.
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Weakness and reduced responsiveness.
Severe dehydration can affect kidney function and circulation.
Why can an intestinal blockage become life-threatening?
The danger is not limited to vomiting.
As pressure builds up inside the intestine, blood flow to the intestinal wall may become compromised.
If the tissue does not receive enough oxygen, it can become damaged.
In severe cases, the intestinal wall may develop areas of tissue death or perforation.
A perforation allows intestinal contents and bacteria to enter the abdominal cavity.
This can cause peritonitis, a dangerous inflammation of the lining of the abdomen.
The infection may then spread into the bloodstream and lead to sepsis.
The WHO identifies very heavy soil-transmitted worm infections as a potential cause of intestinal obstruction, while medical literature describes complications including intestinal ischemia and perforation.
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Image 3 β A pediatric medical examination helps doctors investigate persistent abdominal symptoms.